Patent · US Expired

Apparatus for measuring the content of foreign substances in a gas stream

US5730942A · kind A · utility

7Cited by

26References

19Claims

0Family size

Assignee

Filterwerk Mann & Hummel GmbH · DE

Inventors

Walter Megerle · Pforzheim, DE
Klaus Moessinger · Löwenstein, DE
Gerhard Tritt · Wildberg, DE

Key dates

Filing date	Dec 18, 1995
Grant date	Mar 24, 1998
Priority date	—
Expiry date	Dec 18, 2015

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/123
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A system for measuring the content of foreign substances in a gas stream, for example oil in a stream of compressed air. The system includes at least one probe for collecting a given amount of gas. In the probe there is at least one sensor over which the sampled gas is passed. For optimum evaluation and for signaling certain states of operation, the sensor includes a temperature sensor for determining the temperature of the gas sample flowing past it, and a detector whose electrical resistivity or conductivity depends on the nature and density of the foreign substances in the gas. The output signal of the detector corresponds to the concentration of foreign substance in the gas stream, and is processed in an electronic evaluation unit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.